#21AB4A
Closest named color: Medium Green (#39AD48). oklch(65% 0.178 147.9), rgb(33, 171, 74).
Aa
Black text reads best on this color (6.98:1).
About this color
#21AB4A is a medium-light, vivid green. In OKLCH its lightness is 65%, its chroma 0.178 and its hue 148°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Medium Green (#39AD48), ΔE 0.013 away. Black text reads best on it, at 6.98:1.
| Hue family | Greens |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.178) |
| Temperature | in between |
| Nearest name | Medium Green (#39AD48) |
| Black text | 6.98:1 |
| White text | 3.00:1 |
Values
| HEX | #21AB4A |
| RGB | rgb(33, 171, 74) |
| HSL | hsl(138, 68%, 40%) |
| OKLCH | oklch(65% 0.178 147.9) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #21AB4A | 3.00:1 | AA large text | Lc -61.5 | Content text, not long reading |
| Black text on #21AB4A | 6.98:1 | AA | Lc 47.9 | Large or bold text, headings |
| #21AB4A text on white | 3.00:1 | AA large text | Lc 56.2 | Large or bold text, headings |
| #21AB4A text on black | 6.98:1 | AA | Lc -45.6 | Large or bold text, headings |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F0F8F1
oklch(97.1% 0.013 149.3)
-
Step 100
100
#DFEFE1
oklch(93.6% 0.025 149.1)
-
Step 200
200
#C5E2C8
oklch(88.4% 0.047 148.1)
-
Step 300
300
#9AD1A1
oklch(81% 0.088 148.1)
-
Step 400
400
#5DB86D
oklch(70.8% 0.139 147.8)
-
Step 500
500 (this color)
#21AB4A
oklch(65% 0.178 147.9)
-
Step 600
600
#008B35
oklch(55.5% 0.161 147.8)
-
Step 700
700
#00752C
oklch(49% 0.142 148)
-
Step 800
800
#006022
oklch(42.6% 0.124 147.8)
-
Step 900
900
#00501B
oklch(37.6% 0.109 147.8)
-
Step 950
950
#04300F
oklch(27.1% 0.074 147.5)
#21AB4A with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #AD9B41 | 0.141 |
| Deuteranopia (no green cones) | #9E9152 | 0.139 |
| Tritanopia (no blue cones) | #00A795 | 0.103 |
| Achromatopsia (no color) | #959595 | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21AB4A
#21AB4A
oklch(65% 0.178 147.9)
- #C761C5
#C761C5
oklch(65% 0.178 328.1)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #21AB4A, closest first.
No curated palette has a color within ΔE 0.04 of #21AB4A.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Green #39AD48 ΔE 0.013
- Shamrock #01B44C ΔE 0.026
- Mid Green #50A747 ΔE 0.027
- Kelly Green #02AB2E ΔE 0.027
- Jade Green #2BAF6A ΔE 0.038
- Dark Pastel Green #56AE57 ΔE 0.039
- Grass #5CAC2D ΔE 0.040
- Seaweed Green #35AD6B ΔE 0.041
Use #21AB4A in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.